Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fb3c8ac0918d69…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 05:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0d49dfee61431341f436d6bd68cd241a SHA-1: 3724b05423967c581bfcc8c63739ce70dbd6e6e8 SHA-256: 21fb3c8ac0918d698bbc151ff8b8b6e85843e66ad630db0c9ba8df5812305b82
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free in-game currency, specifically for Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a social engineering tactic to redirect users to potentially malicious sites. While no scripts were directly extracted, the nature of the lures and the ML classification indicate a high likelihood of malicious intent, possibly involving drive-by downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/free-spins-for-coin-master-ios-game-hack PDF link annotation
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/roblox-seraph-free_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-code-card-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3409 22572 bytes
SHA-256: f3249a889d8b9674dd638aebfe3400508a5979b62416affb9759726e36b21536
font_01_sfnt_off0000669c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 18176 bytes
SHA-256: a5a25b2a03d060ab334b2318d32d1d5929522fb18c09f7a175bdb421134f7343

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